CVE-2025-3034HIGH 8.1EPSS p30.7%

CVE-2025-3034CVE-2025-3034

Description

Memory safety bugs present in Firefox 136 and Thunderbird 136. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 137 and Thunderbird 137.

Scoring

CVSS 3.18.1 (HIGH)
VectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS0.39% probability of exploitation · percentile 30.7% · 2026-06-19T12:03:05Z
Published2025-04-01
Last modified2026-04-13

Underlying weaknesses· 1

CWE-787

References

  1. https://bugzilla.mozilla.org/buglist.cgi?bug_id=1894100%2C1934086%2C1950360
  2. https://www.mozilla.org/security/advisories/mfsa2025-20/
  3. https://www.mozilla.org/security/advisories/mfsa2025-23/

1

TypeTargetConfidenceTier
WeaknessOut-of-bounds Writecwe-7870%live

Related by meaning· 6

Nearest entities by semantic similarity across the cs-graph corpus.

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.